Don't take my word for it, but to me it looks like yet another abstraction layer.

And in practice people don't change their cloud providers that often(yes it happens, but USUALLY not).

And again, in practice you should learn this layer and layer from real provider and know how things are mapped from one to another one. Because, again, in practice you will support real k8s cluster or something like that, and you'll need to support and solve problems THERE, but applying fixes in a different domain language HERE.